Bad service

On the 24 i lost my phone and i report it to the police station and i black listed it however a good Samaritan called my mom to come and fetch my phone and i did and i called MTN to notify them that i want to white list my phone and i want advised to go to the police station and i should fax the police report to the and i did so on the4th December 2015 now am trying to call the call center, now their number is not working and now my cant receive my important mail and business calls and its costing me customers. Am going to port my number